Combination-lock



1,32GA4A.

K. BUCZYNSKI AND B. SZOKA.

COMBINATION LOCK. APPLICATION FILED APR. 16. 1919.

Patented Nov. 4, 1919.

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[/1 en for: If azimier u czynsln' Brortii/aw Szo/m Meir AfiarneyKAZIMIEB BUCZYNSKI AND BBONISLAW SZOKA, OF GRAND RAPIDS, MICHIGAN.

COMBINATION-LOCK.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Application filed April 16, 1919. Serial No. 290,541.

To all whom it may concern.

Be it known that I, KAZIMIER BUOZYNSKI, a citizen of Russia, residing atGrand Rapids, county of Kent, and State of Michigan, and I, BRONISLAW82mm, a citizen of Russia, residing at Grand Rapids, county of Kent, andState of Michigan, have invented certain new and useful Improvements inCombination-Locks, of which the following is a specification.

This invention relates to improvements in locks, particularly to typesadapted to be used in connection with folding doors and like slidingparts.

The principal object of the inventionis to provide a novel form of keyoperated lock inwhich the engaging elements are always receptive of thekeeper, and operate simultaneously.

A further object is to provide a lock which can be operated by a keyhaving a definite form of ward, the lock being of the usual appearanceand relatively inexpensive to construct.

These and other like objects are attained by the novel construction andcombination of parts hereinafter described, and shown in theaccompanying drawings, forming a material part of this disclosure, andin which Figure 1 is a side elevational View showing a lock made inaccordance with the invention, the cover plate being removed.

Fig. 2 is a transverse sectional view taken on line 22 of Fig. 1.

Fig. 3 is a fragmentary sectional view taken on line 33 of Fig. 1, and

Fig. 4 is a partial view showing an interior corner of the lockconstruction.

The lock consists of the usual rectangular casing having a bottom plate10, side walls 11 and 12, rear end walls 13, and front wall or faceplate 14, the end wall 13 and face plate 14 having inwardly extendingledges upon which rest the cover plate 15.

Formed through the cover plate is the key entrance 17, adapted toreceive the key 18, having a ward 19, its upper portion having slots 20adapted to engage with corresponding projections formed on the lowersurface of the key entrance 17, so as to prevent the operation of afalse key in.the lock.

Fixed on the bottom plate 10, centrally with the axis of the key 18, isa support 22, on which is rotatably engaged a, spur gear 23, havingrigidly attached upon its side an upturned rigid projection 24, adaptedto engage with the ward 19 as the key is turned, thereby transmittingrotary motion to the gear 23.

In order to prevent excessive motion, a stop 25 is secured to the bottomplate 10, its arm extending over the gear so as to contact with theprojections 24 preventing complete rotation of the gear.

The teeth of the gear 23 mesh with rack teeth 26 formed on the concaveside of a curved bar 27, other teeth 28 and 29, being formed upon theouter side of the bar, all of the teeth extending between flanges 30 and30, and 31 and 31, extending marginally outward so that the bar 27 issupported movably and guided by the upper and lower flanges. One end ofthe outer rack 28, engages with another gear 34 and the other outer rack29 engages with a gear 25, these gears being rotatable upon spindles 36and 37, extending upward from the bottom plate 10 to the cover 15, theflanges 31 and 31 actingas guards for the teeth and assisting insupporting the rack bar 27.

The gear 34 meshes with another gear 38 while the gear 35 meshes with asimilar gear 39, these last named gears being mounted upon posts orspindles 40 and 41, secured like the spindles 36 and 37, between thebottom plate and cover of the lock casing.

Meshing with the gears 38 and 39 are spur pinions 42 and 43 mounted uponpinions 44 and 45, having secured at their lower sides coiled flatsprings 46 and'47, the springs 46 being held against the rear side plate11, by a pair of clips 48, similar clips 49, securing the rearwardlyextending ends of the spring 47, to the side wall 12, these springsbeing adapted to exert torsional movement to the spindles 44 and 45,transmitted through the gear trains to the rack bar 27 and then to thefirst gear 23.

A central hollow tubular post 50 is screw threaded into a lug 51, formedwith a bottom plate 10 so as to hold the parts of the lock casing in arigid position.

Fixed upon the upper sides of the gears 38 and 39 are bars 52 and 53,from which extend hook elements 54 and 55, contiguous to the openings 56and 57, formed in the front plate 14 of the look, into which the keepers58 and 59 may pass, the keepers being provided with openings 60 and 61,receptive of the books 54 and 55, the keepers being rigidly engaged withthe keeper plate 62 in a manner which will be clearly apparent.

Thus, when the door containing the lock casing is closed by sliding ittoward the keeper plate 62,the keeper elements 58 and pass into theopenings 56 and 57 and become engaged with the hooks 55 i and 55, thesprings being retracted, due to the curvature of the respective hooksand keepers, while the springs act to force the hooks into the openingsof thekeepers, holding the doc in a locked position until a key has beeninserted and the train of gears actuated by the rack bar 27, thusreleasing the keepers and pern'iitting the door to be opened in theordinary inanner.

Having thus described our invention what we claim as new, and desire tosecure by Letters Patent, is-

1. In a lock for sliding doors, the combination with a keeper plate, apair of keepers extending therefrom, said keepers having openings, alock casing, a plurality of gear pairs rotatable therein, lock hookscarried by one pair of said gears engageable with the vnation with alock casing, of two pairs of gears pivotally mounted therein, a mastergear adapted to be actuated by a key, a curved rack having teethupon'its concave side engageable with said master gear, teeth formedupon the outer side 01; said rack engageable with first gears in each ofsaid pairs, hooks carriedby the last named pair of gears, said hooksbeing engageable within keepers through openings in the front of saidlock, and means for normally maintainmg said hooks in a lockingposltion.

In testnnony whereof we have aifixed our signatures.

KAZIMIE-R BUCZYNSKI. BRONISLAVV SZOKA.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

